a question about debug using gdb(/lib32/libc.so.6: No such file or directory)


 
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Old 01-16-2009
a question about debug using gdb(/lib32/libc.so.6: No such file or directory)

Hi all,

(gdb) target remote 192.168.185.196:1389
Remote debugging using 192.168.185.196:1389
warning: Unable to find dynamic linker breakpoint function.
GDB will be unable to debug shared library initializers
and track explicitly loaded dynamic code.
0x2fbd0800 in ?? ()
(gdb) l
1 #include <stdio.h>
2
3 int main()
4 {
5 printf ("Hello World\n");
6 return 0;
7 }
(gdb) b main
Breakpoint 1 at 0x1000067c: file hello.c, line 5.
(gdb) info reg pc
pc: 0x2fbd0800
(gdb) c
Continuing.
Error while mapping shared library sections:
/lib32/libc.so.6: No such file or directory.
Error while mapping shared library sections:
/lib32/ld.so.1: No such file or directory.

Breakpoint 1, main () at hello.c:5
5 printf ("Hello World\n");


From the above message, we can see the gdb use the host lib,as we know, It *should* using target lib, it confuses me , why it can get the right output using the host lib,
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oidentd_masq.conf(5)						File Formats Manual					      oidentd_masq.conf(5)

NAME
oidentd_masq.conf - oidentd IP masquerading/NAT configuration file. DESCRIPTION
If you are using IP masquerading or NAT, oidentd can optionally return a username for connections from other machines. Support for this is specified by calling oidentd with the -m (or --masq) flag and by creating an /etc/oidentd_masq.conf file. oidentd can also forward requests for an IP masqueraded connection to the machine from which connection originates by way of the -f option. This will only work if the host to which the connection is forwarded is running oidentd with the -P (proxy) flag, or if the host's ident daemon will return a valid reply regardless of the input supplied by and the address of the host requesting the info (some ident daemons for windows do this, maybe others). FORMAT
<IP Address|Hostname>[/<Mask>] <Ident Response> <System Type> The first field contains the IP address or the hostname of a machine that IP masquerades through the machine on which oidentd runs. The mask parameter can be either a network mask or a mask in CIDR notation. A mask of 24 is equivalent to 255.255.255.0, a mask of 16 is equivalent to 255.255.0.0, etc. The second field specifies the reply that oidentd will return for lookups to the host matching the IP address specified in the first param- eter. The third field specifies the operating system the machine matching the first parameter is running. EXAMPLES
<Host>[/<Mask>] <Ident Response> <System Type> 192.168.1.1 someone UNIX 192.168.1.2 noone WINDOWS 192.168.1.1/32 user1 UNIX 192.168.1.0/24 user3 UNIX 192.168.0.0/16 user4 UNIX somehost user5 UNIX 192.168.1.0/255.255.255.0 user6 UNIX AUTHOR
Ryan McCabe <ryan@numb.org> http://dev.ojnk.net SEE ALSO
oidentd(8) oidentd.conf(5) version 2.0.8 13 Jul 2003 oidentd_masq.conf(5)